Java tutorial
/* * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package java.awt.event; import java.util.EventListener; /** * The listener interface for receiving window events. * The class that is interested in processing a window event * either implements this interface (and all the methods it * contains) or extends the abstract {@code WindowAdapter} class * (overriding only the methods of interest). * The listener object created from that class is then registered with a * Window using the window's {@code addWindowListener} * method. When the window's status changes by virtue of being opened, * closed, activated or deactivated, iconified or deiconified, * the relevant method in the listener object is invoked, and the * {@code WindowEvent} is passed to it. * * @author Carl Quinn * * @see WindowAdapter * @see WindowEvent * @see <a href="https://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html">Tutorial: How to Write Window Listeners</a> * * @since 1.1 */ public interface WindowListener extends EventListener { /** * Invoked the first time a window is made visible. * @param e the event to be processed */ public void windowOpened(WindowEvent e); /** * Invoked when the user attempts to close the window * from the window's system menu. * @param e the event to be processed */ public void windowClosing(WindowEvent e); /** * Invoked when a window has been closed as the result * of calling dispose on the window. * @param e the event to be processed */ public void windowClosed(WindowEvent e); /** * Invoked when a window is changed from a normal to a * minimized state. For many platforms, a minimized window * is displayed as the icon specified in the window's * iconImage property. * @param e the event to be processed * @see java.awt.Frame#setIconImage */ public void windowIconified(WindowEvent e); /** * Invoked when a window is changed from a minimized * to a normal state. * @param e the event to be processed */ public void windowDeiconified(WindowEvent e); /** * Invoked when the Window is set to be the active Window. Only a Frame or * a Dialog can be the active Window. The native windowing system may * denote the active Window or its children with special decorations, such * as a highlighted title bar. The active Window is always either the * focused Window, or the first Frame or Dialog that is an owner of the * focused Window. * @param e the event to be processed */ public void windowActivated(WindowEvent e); /** * Invoked when a Window is no longer the active Window. Only a Frame or a * Dialog can be the active Window. The native windowing system may denote * the active Window or its children with special decorations, such as a * highlighted title bar. The active Window is always either the focused * Window, or the first Frame or Dialog that is an owner of the focused * Window. * @param e the event to be processed */ public void windowDeactivated(WindowEvent e); }